headerpwn: A fuzzer for analyzing how servers respond to different HTTP headers


A fuzzer for finding anomalies and analyzing how servers respond to different HTTP headers.


go install github.com/devanshbatham/headerpwn@v0.0.3


headerpwn allows you to test various headers on a target URL and analyze the responses. Here’s how to use the tool:

  1. Provide the target URL using the -url flag.
  2. Create a file containing the headers you want to test, one header per line. Use the -headers flag to specify the path to this file.

Example usage:

headerpwn -url https://example.com -headers my_headers.txt

  • Format of my_headers.txt should be like the below:
    Proxy-Authenticate: foobar
    Proxy-Authentication-Required: foobar
    Proxy-Authorization: foobar
    Proxy-Connection: foobar
    Proxy-Host: foobar
    Proxy-Http: foobar

Proxying requests through Burp Suite:

Follow the following steps to proxy requests through Burp Suite:

  • Export Burp’s Certificate:

    • In Burp Suite, go to the “Proxy” tab.
    • Under the “Proxy Listeners” section, select the listener that is configured for
    • Click on the “Import/ Export CA Certificate” button.
    • In the certificate window, click “Export Certificate” and save the certificate file (e.g., burp.der).
  • Install Burp’s Certificate:

    • Install the exported certificate as a trusted certificate on your system. How you do this depends on your operating system.
    • On Windows, you can double-click the .cer file and follow the prompts to install it in the “Trusted Root Certification Authorities” store.
    • On macOS, you can double-click the .cer file and add it to the “Keychain Access” application in the “System” keychain.
    • On Linux, you might need to copy the certificate to a trusted certificate location and configure your system to trust it.

You should be all set:

headerpwn -url https://example.com -headers my_headers.txt -proxy

Copyright (c) 2023 Devansh Batham

Source: https://github.com/devanshbatham/